Contact charging device for charging a surface to a given potent

Details Contact charging device for charging a surface to a given potent Contact charging device for charging a surface to a given potent

1995-03-24

1996-12-17

Dang, Thu Anh

Photocopying

Contact printing

Light boxes

361221, G03G 1500

Patent

active

055858970

ABSTRACT:
Disclosed herein is a contact charging device for uniformly charging a moving subject surface to a given potential by bringing a charging member to which a voltage is applied into contact with the moving subject surface. The charging member has a brush structure formed by closely setting a plurality of conductive bristle members into a conductive base member. The charging member is positioned so that the amount of engagement of the conductive bristle members with the subject surface is large on the upstream side of a surface moving direction of the subject surface and small on the downstream side of the surface moving direction. Accordingly, the adhesion of all the conductive bristle members to the subject surface can be enhanced and the deformation of all the conductive bristle members can be prevented. Further, the springing phenomenon of the conductive bristle members on the upstream side having a high charging efficiency can be eliminated. As a result, the subject surface can be charged uniformly and stably.

REFERENCES:
patent: 4371252 (1983-02-01), Uchida et al.
patent: 5225878 (1993-07-01), Asano et al.
patent: 5241342 (1993-08-01), Asano et al.
patent: 5249022 (1993-09-01), Watanabe et al.
patent: 5289234 (1994-02-01), Asano et al.
Patent Abstracts of Japan, vol. 10, No. 223 (P-483) (2279), Aug. 5, 1986, JP-61-57955, Mar. 25, 1986.

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